I ended up letting my best friend have my precious girlfriend, Nana, for just one day. On that day, he sent me a casual photo of their date. "That's a relief..." I thought, but only for a moment. Soon, he began sending photos of him hugging her from behind or the two of them flirting at home. Yet, for some reason, the closer they got, the more excited I became. Nana, actively seeking out his cock, sucking it with passion; the POV photos showing her completely melted, with an expression that seemed to boast of her pleasure as a female. I can't believe she was this slutty, even though she's never had sex with me. The more I see her lewdness, the more I can't stop my cock from hardening. A depressing, masturbatory NTR experience.